This quote is supposed to confirm Thatcher as an anti-social radical individualist of the Ayn Rand distemper.
The brother was an anti-social, self-mythologizing would-be rock star.
From my National Post column: when anti-social behavior masquerades as "free speech".
antisocial an·ti·so·cial (ān'tē-sō'shəl, ān'tī-)
Behaving in a manner that violates the social or legal norms of society.